1. Double floating ball, anti leak: Our full face snorkel mask has twice as much air as other standard snorkel masks, providing maximum air supply. Two waterproof swimming balls for smoother breathing on the surface and more thorough water stop underwater. About water: drop the floating ball to let more air into our snorkel mask. Underwater: The floating ball rises to prevent water from entering the snorkel mask. 2. FULL DRY ANTI FOG BREATHING SYSTEM Our full face snorkel mask has double airflow channels that effectively isolate oxygen and carbon dioxide. Separate breathing chambers allow air to flow away from the snorkel mask, can expel all carbon dioxide and prevent dizziness after prolonged play. Nevertheless, it helps against fog, is scratch resistant, providing a crystal clear view for an enjoyable snorkeling experience and allowing you to snorkel longer. 3. SAFE MATERIAL SEALED SILICONE We use y PC material and adopt special ergonomic design with a tight fit. By using food grade silicone with good elasticity, it fits perfectly to faces and effectively prevents leaks. The braided elastic band does not irritate or put too much pressure on the skin. Simply adjust the straps to gently fit the mask to the chin and face. It can wrap your whole face tightly and softly and be completely waterproof. 4. PANORAMIC VIEW SUPPORT CAMERA MOUNTING Our snorkel mask provides a 180° snorkeling experience without blind spots, allowing a truly wide and clear 180° view underwater. So don't miss the beautiful fish and sea creatures that are not right in front of you. This snorkel mask set is compatible with sports camera mounts, with a removable motion camera mount, which allows you to capture every wonderful moment in the sea.